Next to “Lockscreen cleaner” or “Lockscreen background cleaner”, if the switch is turned off, i.e. with its knob or handle at the left, there’s nothing left for you to do. Otherwise, proceed with the next step.

Find “Example App” in the list of apps.

Next to “Example App”, make sure that the switch is turned on, i.e. with its knob or handle at the right.

There are many apps on the app store which claim to boost performance, free up space, save battery, or optimize the RAM of your device. However, these apps interfere with other apps, like “Example App”, and prevent them from working correctly.